The Mount Brussiloff Mine is mined for magnesite, which is used for a variety of industrial applications. Occasionally, fine crystals of magnesite and dolomite along with several other very rare minerals are uncovered from cavities in the magnesite ore. The gems offered for sale on this page were cut from some of these magnesite crystals.

Transparent magnesite is usually colourless. Magnesite has a hardness of 4 on Moh's hardness scale and has 3 directions of cleavage, making its use in jewellery extremely limited. Magnesite would be very difficult to set into jewellery without scratching, chipping or breaking the stone. If magnesite is set successfully it could possibly be used in earrings and pendants but only if worn with extreme care. Under normal conditions faceted magnesite would be considered too soft and fragile to be worn in jewellery of any kind.